Finding the Fourth Proportional to 23,148.69, 31,945.19 and 12,538.40

Step by Step Solution

1. Step 1: Write the proportion equation
   23,148.69 : 31,945.19 = 12,538.40 : x
2. Step 2: Convert to fraction form
   23,148.69/31,945.19 = 12,538.40/x
3. Step 3: Cross multiply
   23,148.69x = 31,945.19 × 12,538.40
4. Step 4: Simplify right side
   23,148.69x = 400,541,570.30
5. Step 5: Solve for x
   x = 400,541,570.30/23,148.69
6. Step 6: Final answer
   x = 17,302.99